Finding the Fourth Proportional to 78,089.72, 107,762.82 and 42,278.92

Step by Step Solution

1. Step 1: Write the proportion equation
   78,089.72 : 107,762.82 = 42,278.92 : x
2. Step 2: Convert to fraction form
   78,089.72/107,762.82 = 42,278.92/x
3. Step 3: Cross multiply
   78,089.72x = 107,762.82 × 42,278.92
4. Step 4: Simplify right side
   78,089.72x = 4,556,095,645.75
5. Step 5: Solve for x
   x = 4,556,095,645.75/78,089.72
6. Step 6: Final answer
   x = 58,344.37